Man of the match and IPL.

Last night I watched ipl match between kkr and SRH. SRH won by 5 wkts.

If we summarize that match, who was the best player?
We can consider player of wining team only..

Billy Stanlake: 4 over 21 run 2 wkts.
Williamson: 50 run at 44 balls.
3.Bhuvneshwar Kumar: 4 over 26 run 3 wkts.
Shakib Al Hasan: 4 over 21 run 2 wkts, in batting 27 run at 21 balls, in fielding 2 extraordinary catch.

Above 4 were the competitors for man of the match. For the winning of SRH those people played very well.

I want to know which performance was best if you choose one?

The match officials declared man of the was Billy Stanlake of his 2/21.

Was Billy Stanlake's performance more better then Shakib's performance??

I can not understand what is the measurement of player of the?

But according to social media and some newspapers observation Shakib was the best player of that match.